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  4. For substances, hysteresis (B-H) curves are given as shown in figure. For making temporary magnet which of the following is the best?

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Q. For substances, hysteresis $(B-H)$ curves are given as shown in figure. For making temporary magnet which of the following is the best?

Magnetism and Matter

Solution:

For a temporary magnet, the hysteresis loop should be long and narrow.